US4665780A - Method of machining threaded pipe-ends - Google Patents

Method of machining threaded pipe-ends Download PDF

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Publication number
US4665780A
US4665780A US06/746,401 US74640185A US4665780A US 4665780 A US4665780 A US 4665780A US 74640185 A US74640185 A US 74640185A US 4665780 A US4665780 A US 4665780A
Authority
US
United States
Prior art keywords
machining
collar
spindle
stop
tapered
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/746,401
Other languages
English (en)
Inventor
Bernard Plaquin
Louis Fradin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vallourec SA
Original Assignee
Vallourec SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vallourec SA filed Critical Vallourec SA
Assigned to VALLOUREC, A CORP OF FRANCE reassignment VALLOUREC, A CORP OF FRANCE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: FRADIN, LOUIS, PLAQUIN, BERNARD
Application granted granted Critical
Publication of US4665780A publication Critical patent/US4665780A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
    • B23G1/00—Thread cutting; Automatic machines specially designed therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/16—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for bevelling, chamfering, or deburring the ends of bars or tubes
    • B23B5/161—Devices attached to the workpiece
    • B23B5/162—Devices attached to the workpiece with an internal clamping device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/16—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for bevelling, chamfering, or deburring the ends of bars or tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B5/16—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for bevelling, chamfering, or deburring the ends of bars or tubes
    • B23B5/161—Devices attached to the workpiece
    • B23B5/163—Devices attached to the workpiece with an external clamping device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/557—Frictionally engaging sides of opening in work
    • Y10T408/558—Opening coaxial with Tool
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/55—Cutting by use of rotating axially moving tool with work-engaging structure other than Tool or tool-support
    • Y10T408/557—Frictionally engaging sides of opening in work
    • Y10T408/558—Opening coaxial with Tool
    • Y10T408/5583—Engaging sides of opening being enlarged by Tool
    • Y10T408/5586—Engaging surface subsequent to tool-action on that surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T409/00—Gear cutting, milling, or planing
    • Y10T409/30—Milling
    • Y10T409/306664—Milling including means to infeed rotary cutter toward work
    • Y10T409/306776—Axially
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/10—Process of turning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/22—Portable lathe for pipe turning

Definitions

  • the present invention concerns a new process for machining elements of a joint for steel tubes, especially those intended for the petroleum industry, which contains at least one threading, one truncated surface and at least one screw stop, as well as a device for implementation of this process.
  • Joints are therefore known in which one connected tubes with truncated threadings and in which the end of the male element stops against a shoulder located within the female element.
  • joints of this type in which there is also a shoulder for screw stopping on the male element, a shoulder against which the end of the female element rests during screwing.
  • the process according to the invention ensures precise positioning of the screw stops, on the one hand relative to the truncated threading, and on the other hand between the screw stops that can exist on the same joint.
  • the object of the present invention is a process for machining a joint element for a steel tube intended in particular for the petroleum industry, containing a truncated surface and at least one screw stop, characterized by the fact that one first carries out final machining of a truncated surface that contains the joint element and premachining of the screw stop or stops of the element; that one applies on said truncated surface a collar having the same conicity as that of the latter installed to rotate and move axially relative to the spindle that carries the machining tool or tools of the screw stop or stops; that by imparting a rotary movement to the joint element relative to said spindle one causes a relative axial displacement of the tool holder spindle and the rotated tube in order to achieve final machining of the screw stop or stops of the joint element until the conical collar applied to said conical surface represents a stop that opposes a final relative axial displacements of the tool holder spindle relative to the machined element.
  • Another object of the present invention is a device for employing the process discussed above, this device being characterized by the fact that it contains a rotating clamping jaw, capable of rotating the joint element being machined and a tool holder spindle equipped with a tool for final machining of the surfaces of the screw stop or stops that the joint element contains, said tool holder spindle also containing a collar having a support surface of truncated shape whose conicity is the same as that of the element's threading, said collar being capable of rotating around its axis relative to the tool holder spindle and sliding axially relative to the latter, said collar preferably being spun elastically relative to the tool holder spindle in the direction of the joint element being machined, a pair of integral stops of said collar and said tool holder interrupting advance of the tool holder spindle during final machining of the surface or surfaces of the screw stops of the joint element.
  • the invention can be applied to machining of joints in elements in which the threadings and the stop or stops are made in the thickness of the tubes after possible upsetting and forging of the end of the latter.
  • the invention can also be applied to composite joints in which the stops can be made by attached elements such as screwed or glued sleeves.
  • the truncated surface machined beforehand on the joint element consists of the crests of threads making up the conical threading of the element, or the crests of certain threads (especially of the ends) that define a conical surface on a threading that is cylindrical overall.
  • This variant can be used in particular in the case of cylindrical threadings and especially in the case of staggered cylindrical threadings that are separated by conical sealing surfaces.
  • FIG. 1 is a schematic half cross section of a device according to the invention that carries out machining of a male joint element containing a single stop on its end,
  • FIG. 2 is a schematic half cross section of a device according to the invention that carries out simultaneous machining of two stops on a female element containing an internal conical threading.
  • the tool holder spindle 3 contains a plate 4 on which a tool 5 is attached whose shape corresponds to that which one wishes to impart to the end of the male element 1 which must be finally machined after a premachining.
  • a cylindrical sleeve 4a is attached in a predetermined position on plate 4 of the tool holder spindle. This attachment is achieved by screwing in threadings 6, whereas one part of plate 4 is shrunk onto a cylindrical bore 7 of sleeve 4a.
  • a blocking collar 8 forming a stop is screwed into threading 6 of sleeve 4a so as to immobilize sleeve 4a relative to plate 4 in a controllable and predetermined position.
  • Sleeve 4a contains an internal stop 9 that serves, as will be discussed hereafter, to limit advance of tool 5 during machining.
  • Sleeve 4a also contains in front of stop 9 a cylindrical bore 10 within which a collar 11 equipped on its periphery and on its rear face with antifriction coating 12 can pivot around its axis and move axially.
  • a stop 13 held by a clip 14 prevents collar 11 from leaving sleeve 4a.
  • blocking collar 8 By virtue of blocking collar 8 one attaches sleeve 4a relative to plate 4 in a position so that, when collar 11 rests against the advance stop 9 of sleeve 4a, the end of tube element 1 is finally machined in the position one desires to impart to it relative to threading 2.
  • the inside surface 15 of collar 11 has a truncated shape whose conicity is equal to that of threading 2 so that during machining the truncated surface 15 rests against the crest of the threads of threading 2.
  • an elastic means (not shown) constantly forces collar 11 in a direction opposite to tool 5.
  • the truncated surface 15 of collar 11 can rest against the truncated part of the crests of the threads of threading 2 which will be located near the end of tube 1, threading 2 then being cylindrical, but with truncated thread crests at the end of the threading.
  • FIG. 2 schematically depicts a half section of another device according to the invention that permits final machining of the surfaces of stop 17 and 18 which are found on a female element 1a equipped with internal truncated threading 2a.
  • the female element 1a is held by rotating clamping jaws 16 in the axis of the tool holder spindle 3 which is equipped with a cylindrical part 10 on which a collar 11 provided with antifriction coatings 12 slides and whose outside surface has a truncated shape whose conicity is equal to that of threading 2a of the female element.
  • a plate 4 that carries a tool 5a is mounted on the tool holder spindle 3 by a cylindrical bearing surface 7 and by a threading 6, whereas a counternut 8 ensures blocking of plate 4 in a position that corresponds to the distance one desires to obtain between the surfaces of stops 17 and 18 of the female that are finally machined by tools 5 and 5a.
  • the sliding collar 11 is preferably forced in the direction of tool 5 by an elastic component not shown.
  • Tools 5 and 5a then shift to the left, machining stops 17 and 18, as well as the sealing surfaces for tool 5 that are near stop 18. This is naturally final machining, premachining having been carried out beforehand.
  • a mechanical stop positioned initially by a spring that is compressed during machining, a stop with ball bearings, needles or rollers being interposed between the mechanical stop and the collar.
  • a stop with a controllable electrical contact is advantageously provided and controlled so as to anticipate the mechanical stop by a few hundredths of a millimeter. The electrical contact obtained can be used to stop advance of the device without interrupting rotation of the joint element during machining.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Turning (AREA)
  • Gripping On Spindles (AREA)
  • Joints Allowing Movement (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Dowels (AREA)
  • Drilling And Boring (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Jigs For Machine Tools (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • External Artificial Organs (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Earth Drilling (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
US06/746,401 1984-06-19 1985-06-19 Method of machining threaded pipe-ends Expired - Fee Related US4665780A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8409566 1984-06-19
FR8409566A FR2565863B1 (fr) 1984-06-19 1984-06-19 Procede pour l'usinage de joints pour tubes destines en particulier a l'industrie du petrole comportant un filetage conique et au moins une butee de limitation de vissage et dispositif pour la mise en oeuvre de ce procede

Publications (1)

Publication Number Publication Date
US4665780A true US4665780A (en) 1987-05-19

Family

ID=9305180

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/746,401 Expired - Fee Related US4665780A (en) 1984-06-19 1985-06-19 Method of machining threaded pipe-ends

Country Status (14)

Country Link
US (1) US4665780A (no)
EP (1) EP0170553B1 (no)
JP (1) JPS6165702A (no)
KR (1) KR910004544B1 (no)
AT (1) ATE58076T1 (no)
AU (1) AU576873B2 (no)
BR (1) BR8502938A (no)
CA (1) CA1238772A (no)
DE (2) DE170553T1 (no)
FR (1) FR2565863B1 (no)
IN (1) IN163174B (no)
MX (1) MX162172A (no)
NO (1) NO168874C (no)
OA (1) OA08040A (no)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245516A (en) * 1990-06-29 1992-01-08 Geoffrey Samuel Rose Pipe beveller
WO1998048961A1 (en) * 1997-04-29 1998-11-05 Fraering Camille M Jr Apparatus for reconditioning tubular connection seal shoulders
US6041487A (en) * 1996-01-18 2000-03-28 Marubeni Tubulars, Inc. Method for producing sealing surfaces on a tubular member
US8784161B1 (en) * 2013-12-27 2014-07-22 Tubular Inspection Products, Inc. Mandrel assembly for repairing drill pipe facings
WO2014193391A1 (en) * 2013-05-30 2014-12-04 Magna-Sonic Stress Testers Inc. Refacing tools and methods
US8925431B2 (en) 2010-11-29 2015-01-06 Magna-Sonic Stress Testers, Inc. Refacing tools and methods
US20150047478A1 (en) * 2013-08-19 2015-02-19 Reface Systems, LLC Tubular connection refacing apparatus and methods
USD731277S1 (en) 2013-08-16 2015-06-09 Magna-Sonic Stress Testers, Inc. Barrel for pipe end refacing tool
USD737640S1 (en) 2013-08-16 2015-09-01 Magna-Sonic Stress Testers, Inc. Wrench
USD762739S1 (en) 2013-08-15 2016-08-02 Magna-Sonic Stress Testers, Inc. Pipe end refacing tool
US9459082B2 (en) * 2014-07-17 2016-10-04 Douglas Hilton Giraud Compact case trimmer
US11400525B2 (en) 2020-09-04 2022-08-02 Grant Prideco, L.P. Tools and methods for refacing tubular ends forming a threaded connection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101745825B (zh) * 2010-02-04 2012-07-25 伊顿液压(宁波)有限公司 一种用于管接头加工的夹套
CN103978230B (zh) * 2014-03-20 2016-08-31 南京页岩动力设备有限公司 大型超长带锥度孔的管形零件加工装置及加工方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2094491A (en) * 1934-07-20 1937-09-28 Janata Rudolph Screw thread joint
US2211183A (en) * 1938-09-12 1940-08-13 Hydril Co Reamer for well pipe joints
US2218147A (en) * 1939-03-28 1940-10-15 Nat Tube Co Chamfering tool
US2528474A (en) * 1945-10-22 1950-10-31 Hughes Tool Co Spring loaded tool joint dressing tool
US3124024A (en) * 1964-03-10 pittman
US3561302A (en) * 1968-04-24 1971-02-09 Texas Techn Enterprises Method and apparatus for machining tubular members
US3691882A (en) * 1971-03-18 1972-09-19 Dulas L Massey Threaded pipe joint facing tool
US3717055A (en) * 1971-02-01 1973-02-20 E Pendleton Portable tool for refacing drill pipe
US3994516A (en) * 1975-03-05 1976-11-30 Otis Engineering Corporation Telescoping pipe coupling with improved pressure seal connection threads

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3181398A (en) * 1962-10-29 1965-05-04 John M Rogers Pipe joint refacing apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3124024A (en) * 1964-03-10 pittman
US2094491A (en) * 1934-07-20 1937-09-28 Janata Rudolph Screw thread joint
US2211183A (en) * 1938-09-12 1940-08-13 Hydril Co Reamer for well pipe joints
US2218147A (en) * 1939-03-28 1940-10-15 Nat Tube Co Chamfering tool
US2528474A (en) * 1945-10-22 1950-10-31 Hughes Tool Co Spring loaded tool joint dressing tool
US3561302A (en) * 1968-04-24 1971-02-09 Texas Techn Enterprises Method and apparatus for machining tubular members
US3717055A (en) * 1971-02-01 1973-02-20 E Pendleton Portable tool for refacing drill pipe
US3691882A (en) * 1971-03-18 1972-09-19 Dulas L Massey Threaded pipe joint facing tool
US3994516A (en) * 1975-03-05 1976-11-30 Otis Engineering Corporation Telescoping pipe coupling with improved pressure seal connection threads

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245516A (en) * 1990-06-29 1992-01-08 Geoffrey Samuel Rose Pipe beveller
US6041487A (en) * 1996-01-18 2000-03-28 Marubeni Tubulars, Inc. Method for producing sealing surfaces on a tubular member
WO1998048961A1 (en) * 1997-04-29 1998-11-05 Fraering Camille M Jr Apparatus for reconditioning tubular connection seal shoulders
US5852962A (en) * 1997-04-29 1998-12-29 Fraering, Jr.; Camille M. Apparatus for reconditioning threaded tubular connection seal shoulders
US8925431B2 (en) 2010-11-29 2015-01-06 Magna-Sonic Stress Testers, Inc. Refacing tools and methods
US9393625B2 (en) 2010-11-29 2016-07-19 Magna-Sonic Stress Testers, Inc. Refacing tools and methods
WO2014193391A1 (en) * 2013-05-30 2014-12-04 Magna-Sonic Stress Testers Inc. Refacing tools and methods
USD762739S1 (en) 2013-08-15 2016-08-02 Magna-Sonic Stress Testers, Inc. Pipe end refacing tool
USD731277S1 (en) 2013-08-16 2015-06-09 Magna-Sonic Stress Testers, Inc. Barrel for pipe end refacing tool
USD737640S1 (en) 2013-08-16 2015-09-01 Magna-Sonic Stress Testers, Inc. Wrench
US9623485B2 (en) * 2013-08-19 2017-04-18 Reface Systems, LLC Tubular connection refacing apparatus and methods
US20150047478A1 (en) * 2013-08-19 2015-02-19 Reface Systems, LLC Tubular connection refacing apparatus and methods
US10189088B2 (en) 2013-08-19 2019-01-29 Reface Systems, LLC Tubular connection refacing apparatus and methods
US8784161B1 (en) * 2013-12-27 2014-07-22 Tubular Inspection Products, Inc. Mandrel assembly for repairing drill pipe facings
US9541365B2 (en) 2014-07-17 2017-01-10 Douglas Hilton Giraud Compact case trimmer
US9459082B2 (en) * 2014-07-17 2016-10-04 Douglas Hilton Giraud Compact case trimmer
US11400525B2 (en) 2020-09-04 2022-08-02 Grant Prideco, L.P. Tools and methods for refacing tubular ends forming a threaded connection
US12076798B2 (en) 2020-09-04 2024-09-03 National Oilwell Varco, L.P. Tools and methods for refacing tubular ends forming a threaded connection

Also Published As

Publication number Publication date
IN163174B (no) 1988-08-20
AU4382385A (en) 1986-01-02
DE170553T1 (de) 1986-09-04
EP0170553B1 (fr) 1990-11-07
JPS6165702A (ja) 1986-04-04
NO852461L (no) 1985-12-20
JPH0355242B2 (no) 1991-08-22
BR8502938A (pt) 1986-03-04
KR910004544B1 (ko) 1991-07-06
NO168874B (no) 1992-01-06
AU576873B2 (en) 1988-09-08
KR860000118A (ko) 1986-01-25
FR2565863A1 (fr) 1985-12-20
DE3580416D1 (de) 1990-12-13
OA08040A (fr) 1987-01-31
EP0170553A1 (fr) 1986-02-05
FR2565863B1 (fr) 1988-03-25
ATE58076T1 (de) 1990-11-15
CA1238772A (fr) 1988-07-05
MX162172A (es) 1991-04-04
NO168874C (no) 1992-04-15

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Owner name: VALLOUREC, 7, PLACE DU CHANCELIER ADENAUER-75116 P

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